{"id":"CVE-2024-50014","state":"PUBLISHED","title":"ext4: fix access to uninitialised lock in fc replay path","description":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix access to uninitialised lock in fc replay path\n\nThe following kernel trace can be triggered with fstest generic/629 when\nexecuted against a filesystem with fast-commit feature enabled:\n\nINFO: trying to register non-static key.\nThe code is fine but needs lockdep annotation, or maybe\nyou didn't initialize this object before use?\nturning off the locking correctness validator.\nCPU: 0 PID: 866 Comm: mount Not tainted 6.10.0+ #11\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.2-3-gd478f380-prebuilt.qemu.org 04/01/2014\nCall Trace:\n <TASK>\n dump_stack_lvl+0x66/0x90\n register_lock_class+0x759/0x7d0\n __lock_acquire+0x85/0x2630\n ? __find_get_block+0xb4/0x380\n lock_acquire+0xd1/0x2d0\n ? __ext4_journal_get_write_access+0xd5/0x160\n _raw_spin_lock+0x33/0x40\n ? __ext4_journal_get_write_access+0xd5/0x160\n __ext4_journal_get_write_access+0xd5/0x160\n ext4_reserve_inode_write+0x61/0xb0\n __ext4_mark_inode_dirty+0x79/0x270\n ? ext4_ext_replay_set_iblocks+0x2f8/0x450\n ext4_ext_replay_set_iblocks+0x330/0x450\n ext4_fc_replay+0x14c8/0x1540\n ? jread+0x88/0x2e0\n ? rcu_is_watching+0x11/0x40\n do_one_pass+0x447/0xd00\n jbd2_journal_recover+0x139/0x1b0\n jbd2_journal_load+0x96/0x390\n ext4_load_and_init_journal+0x253/0xd40\n ext4_fill_super+0x2cc6/0x3180\n...\n\nIn the replay path there's an attempt to lock sbi->s_bdev_wb_lock in\nfunction ext4_check_bdev_write_error().  Unfortunately, at this point this\nspinlock has not been initialized yet.  Moving it's initialization to an\nearlier point in __ext4_fill_super() fixes this splat.","publishedAt":"2024-10-21T18:54:05.764Z","updatedAt":"2026-10-15T00:56:03.907Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"01efe93a5aa20a19b390426718dc214898a7c2ec","status":"affected","lessThan":"6e35f560daebe40264c95e9a1ab03110d4997df6","versionType":"git"},{"version":"01efe93a5aa20a19b390426718dc214898a7c2ec","status":"affected","lessThan":"d157fc20ca5239fd56965a5a8aa1a0e25919891a","versionType":"git"},{"version":"01efe93a5aa20a19b390426718dc214898a7c2ec","status":"affected","lessThan":"b002031d585a14eed511117dda8c6452a804d508","versionType":"git"},{"version":"01efe93a5aa20a19b390426718dc214898a7c2ec","status":"affected","lessThan":"23dfdb56581ad92a9967bcd720c8c23356af74c1","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/super.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","versionType":"semver"},{"version":"6.6.75","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.10.14","status":"unaffected","lessThanOrEqual":"6.10.*","versionType":"semver"},{"version":"6.11.3","status":"unaffected","lessThanOrEqual":"6.11.*","versionType":"semver"},{"version":"6.12","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/super.c"]}],"references":["https://git.kernel.org/stable/c/6e35f560daebe40264c95e9a1ab03110d4997df6","https://git.kernel.org/stable/c/d157fc20ca5239fd56965a5a8aa1a0e25919891a","https://git.kernel.org/stable/c/b002031d585a14eed511117dda8c6452a804d508","https://git.kernel.org/stable/c/23dfdb56581ad92a9967bcd720c8c23356af74c1","https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html","https://cert-portal.siemens.com/productcert/html/ssa-019113.html","https://cert-portal.siemens.com/productcert/html/ssa-457936.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:07:56.516Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/50xxx/CVE-2024-50014.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-50014","state":"PUBLISHED","datePublished":"2024-10-21T18:54:05.764Z","dateUpdated":"2026-10-15T00:56:03.907Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-10-21T12:17:06.062Z"},"containers":{"cna":{"title":"ext4: fix access to uninitialised lock in fc replay path","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix access to uninitialised lock in fc replay path\n\nThe following kernel trace can be triggered with fstest generic/629 when\nexecuted against a filesystem with fast-commit feature enabled:\n\nINFO: trying to register non-static key.\nThe code is fine but needs lockdep annotation, or maybe\nyou didn't initialize this object before use?\nturning off the locking correctness validator.\nCPU: 0 PID: 866 Comm: mount Not tainted 6.10.0+ #11\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.2-3-gd478f380-prebuilt.qemu.org 04/01/2014\nCall Trace:\n <TASK>\n dump_stack_lvl+0x66/0x90\n register_lock_class+0x759/0x7d0\n __lock_acquire+0x85/0x2630\n ? __find_get_block+0xb4/0x380\n lock_acquire+0xd1/0x2d0\n ? __ext4_journal_get_write_access+0xd5/0x160\n _raw_spin_lock+0x33/0x40\n ? __ext4_journal_get_write_access+0xd5/0x160\n __ext4_journal_get_write_access+0xd5/0x160\n ext4_reserve_inode_write+0x61/0xb0\n __ext4_mark_inode_dirty+0x79/0x270\n ? ext4_ext_replay_set_iblocks+0x2f8/0x450\n ext4_ext_replay_set_iblocks+0x330/0x450\n ext4_fc_replay+0x14c8/0x1540\n ? jread+0x88/0x2e0\n ? rcu_is_watching+0x11/0x40\n do_one_pass+0x447/0xd00\n jbd2_journal_recover+0x139/0x1b0\n jbd2_journal_load+0x96/0x390\n ext4_load_and_init_journal+0x253/0xd40\n ext4_fill_super+0x2cc6/0x3180\n...\n\nIn the replay path there's an attempt to lock sbi->s_bdev_wb_lock in\nfunction ext4_check_bdev_write_error().  Unfortunately, at this point this\nspinlock has not been initialized yet.  Moving it's initialization to an\nearlier point in __ext4_fill_super() fixes this splat."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"01efe93a5aa20a19b390426718dc214898a7c2ec","status":"affected","lessThan":"6e35f560daebe40264c95e9a1ab03110d4997df6","versionType":"git"},{"version":"01efe93a5aa20a19b390426718dc214898a7c2ec","status":"affected","lessThan":"d157fc20ca5239fd56965a5a8aa1a0e25919891a","versionType":"git"},{"version":"01efe93a5aa20a19b390426718dc214898a7c2ec","status":"affected","lessThan":"b002031d585a14eed511117dda8c6452a804d508","versionType":"git"},{"version":"01efe93a5aa20a19b390426718dc214898a7c2ec","status":"affected","lessThan":"23dfdb56581ad92a9967bcd720c8c23356af74c1","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/super.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","versionType":"semver"},{"version":"6.6.75","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.10.14","status":"unaffected","lessThanOrEqual":"6.10.*","versionType":"semver"},{"version":"6.11.3","status":"unaffected","lessThanOrEqual":"6.11.*","versionType":"semver"},{"version":"6.12","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/super.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/6e35f560daebe40264c95e9a1ab03110d4997df6"},{"url":"https://git.kernel.org/stable/c/d157fc20ca5239fd56965a5a8aa1a0e25919891a"},{"url":"https://git.kernel.org/stable/c/b002031d585a14eed511117dda8c6452a804d508"},{"url":"https://git.kernel.org/stable/c/23dfdb56581ad92a9967bcd720c8c23356af74c1"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T20:43:52.724Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.6.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.10.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.11.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.12"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA 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